/Engine/Plugins/Runtime/MassEntity/Source/MassEntityTestSuite/Public/MassEntityTestTypes.h
The main point of thisFMassProcessingPhaseManagerextension is to disable world-based ticking, even if a world is available.
struct FMassTestProcessingPhaseManager : public [FMassProcessingPhaseManager](API\Plugins\MassEntity\FMassProcessingPhaseManager)